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Q:

trouble starting on 1993 Pontiac Bonneville

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Have a pontiac Bonneville every so often it will not start battery is dead battery checks out good alternator checks good starter cables tight dash gauges goes in and out bit still seems to show charging.
(1) Answer
Sometimes a battery can have a intermittent cell shorting out and will drain the battery and not do it again for a week or two